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python-blog/articles/models.py

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import re
import uuid
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from functools import cached_property
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import html2text
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import markdown
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import readtime
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from django.contrib.auth.models import AbstractUser
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from django.contrib.contenttypes.models import ContentType
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from django.db import models
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from django.template.defaultfilters import slugify
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from django.urls import reverse
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from django.utils import timezone
from markdown.extensions.codehilite import CodeHiliteExtension
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from articles.markdown import LazyLoadingImageExtension
from articles.utils import build_full_absolute_url
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class User(AbstractUser):
pass
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class AdminUrlMixin:
def get_admin_url(self):
content_type = ContentType.objects.get_for_model(self.__class__)
return reverse(
"admin:%s_%s_change" % (content_type.app_label, content_type.model),
args=(self.id,),
)
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def format_article_content(content):
md = markdown.Markdown(
extensions=[
"extra",
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"admonition",
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CodeHiliteExtension(linenums=False, guess_lang=False),
LazyLoadingImageExtension(),
]
)
content = re.sub(r"(\s)#(\w+)", r"\1\#\2", content)
return md.convert(content)
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class Article(AdminUrlMixin, models.Model):
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DRAFT = "draft"
PUBLISHED = "published"
STATUS_CHOICES = [
(DRAFT, "Draft"),
(PUBLISHED, "Published"),
]
title = models.CharField(max_length=255)
content = models.TextField()
status = models.CharField(max_length=15, choices=STATUS_CHOICES, default=DRAFT)
published_at = models.DateTimeField(null=True, blank=True)
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(auto_now=True)
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author = models.ForeignKey(User, on_delete=models.PROTECT, default=1)
views_count = models.IntegerField(default=0)
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slug = models.SlugField(unique=True, max_length=255)
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keywords = models.CharField(max_length=255, blank=True)
has_code = models.BooleanField(default=False, blank=True)
is_home = models.BooleanField(default=False, blank=True)
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custom_css = models.TextField(blank=True)
draft_key = models.UUIDField(default=uuid.uuid4)
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class Meta:
ordering = ["-published_at"]
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def __str__(self):
return f"{self.title}"
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def get_absolute_url(self):
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return reverse("article-detail", kwargs={"slug": self.slug})
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def get_abstract(self):
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html = self.get_formatted_content
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return html.split("<!--more-->")[0]
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@cached_property
def get_description(self):
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html = self.get_formatted_content
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converter = html2text.HTML2Text()
converter.ignore_images = True
converter.ignore_links = True
converter.ignore_tables = True
converter.ignore_emphasis = True
text = converter.handle(html)
total_length = 0
text_result = []
for word in text.split():
if len(word) + 1 + total_length > 160:
break
text_result.append(word)
total_length += len(word) + 1
return " ".join(text_result) + "..."
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@cached_property
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def get_formatted_content(self):
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return format_article_content(self.content)
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def publish(self):
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if not self.published_at:
self.published_at = timezone.now()
self.status = self.PUBLISHED
self.save()
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return self
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def unpublish(self):
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self.published_at = None
self.status = self.DRAFT
self.save()
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return self
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def save(self, *args, **kwargs):
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if not self.slug:
self.slug = slugify(self.title)
return super().save(*args, **kwargs)
@property
def draft_public_url(self):
url = self.get_absolute_url() + f"?draft_key={self.draft_key}"
return build_full_absolute_url(request=None, url=url)
def refresh_draft_key(self):
self.draft_key = uuid.uuid4()
self.save()
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def get_read_time(self):
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content = self.get_formatted_content
if content:
return readtime.of_html(content).minutes
return 0